package main

import "fmt"

func ping(pings chan<- string, msg string){
	pings <- msg
}

func pong(pings <-chan string, pongs chan<- string){
	msg := <- pings
	pongs <- msg
}

func main(){
	pings:=make(chan string, 1)
	pongs:=make(chan string, 1)

	ping(pings,"press message")
	pong(pings, pongs)
	fmt.Println(<-pongs)
}